<?php 

if( ! defined( 'ABSPATH' ) ) exit; // Exit if accessed directly

if( ! class_exists('ACF_Location_Nav_Menu') ) :

class ACF_Location_Nav_Menu extends ACF_Location {
	
	/**
	 * Initializes props.
	 *
	 * @date	5/03/2014
	 * @since	5.0.0
	 *
	 * @param	void
	 * @return	void
	 */
	public function initialize() {
		$this->name = 'nav_menu';
		$this->label = __( "Menu", 'acf' );
		$this->category = 'forms';
		$this->object_type = 'menu';
	}	
	
	/**
	 * Matches the provided rule against the screen args returning a bool result.
	 *
	 * @date	9/4/20
	 * @since	5.9.0
	 *
	 * @param	array $rule The location rule.
	 * @param	array $screen The screen args.
	 * @param	array $field_group The field group settings.
	 * @return	bool
	 */
	public function match( $rule, $screen, $field_group ) {
		
		// Check screen args.
		if( isset($screen['nav_menu']) ) {
			$nav_menu = $screen['nav_menu'];
		} else {
			return false;
		}
		
		// Allow for "location/xxx" rule value.
		$bits = explode('/', $rule['value']);
		if( $bits[0] === 'location' ) {
			$location = $bits[1];
			
			// Get the map of menu locations [location => menu_id] and update $nav_menu to a location value.
			$menu_locations = get_nav_menu_locations();
			if( isset($menu_locations[ $location ]) ) {
				$rule['value'] = $menu_locations[ $location ];
			}
		}
		
		// Compare rule against $nav_menu.
		return $this->compare_to_rule( $nav_menu, $rule );
	}
	
	/**
	 * Returns an array of possible values for this rule type.
	 *
	 * @date	9/4/20
	 * @since	5.9.0
	 *
	 * @param	array $rule A location rule.
	 * @return	array
	 */
	public function get_values( $rule ) {
		$choices = array(
			'all' => __( 'All', 'acf' )
		);
		
		// Append locations.
		$nav_locations = get_registered_nav_menus();
		if( $nav_locations ) {
			$cat = __( 'Menu Locations', 'acf' );
			foreach( $nav_locations as $slug => $title ) {
				$choices[ $cat ][ "location/$slug" ] = $title;
			}
		}
		
		// Append menu IDs.
		$nav_menus = wp_get_nav_menus();
		if( $nav_menus ) {
			$cat = __( 'Menus', 'acf' );
			foreach( $nav_menus as $nav_menu ) {
				$choices[ $cat ][ $nav_menu->term_id ] = $nav_menu->name;
			}
		}	
		
		// Return choices.
		return $choices;
	}
}

// Register.
acf_register_location_type( 'ACF_Location_Nav_Menu' );

endif; // class_exists check
